EP2695600A1 - Compositions cosmétiques dermiques ayant une activité osmo-protectrice - Google Patents

Compositions cosmétiques dermiques ayant une activité osmo-protectrice Download PDF

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Publication number
EP2695600A1
EP2695600A1 EP12425137.2A EP12425137A EP2695600A1 EP 2695600 A1 EP2695600 A1 EP 2695600A1 EP 12425137 A EP12425137 A EP 12425137A EP 2695600 A1 EP2695600 A1 EP 2695600A1
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EP
European Patent Office
Prior art keywords
cosmetic compositions
trehalose
ectoine
stressed
expression
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EP12425137.2A
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German (de)
English (en)
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EP2695600B1 (fr
Inventor
Giovanni Baratto
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Unifarco SpA
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Unifarco SpA
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Priority to EP12425137.2A priority Critical patent/EP2695600B1/fr
Priority to ES12425137.2T priority patent/ES2624306T3/es
Priority to PCT/EP2013/066234 priority patent/WO2014023649A2/fr
Publication of EP2695600A1 publication Critical patent/EP2695600A1/fr
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
    • A61K8/4953—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom containing pyrimidine ring derivatives, e.g. minoxidil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/60—Sugars; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
    • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Definitions

  • the present invention relates to dermal cosmetic compositions having osmoprotecting activity.
  • Osmotic shock or osmotic stress is a sudden change in the solute concentration around a cell, causing a rapid change in the movement of water across its cell membrane.
  • water is drawn out of the cells through osmosis. This also inhibits the transport of substrates and cofactors into the cell thus "shocking" the cell.
  • water enters the cell in large amounts, causing it to swell and either burst or undergo apoptosis.
  • Osmoprotectants are highly soluble organic molecules, electrically neutral at physiological pH, having the function to protect the cell against osmotic stress.
  • Possible mechanisms have been proposed in the past decades, such as both those implying a direct interaction of the osmoprotectant with the protein and those based on an indirect effect of the osmoprotectant.
  • Recently the most reliable theories encompass that osmoprotectant act with two different mechanisms the former stabilize the protein with an indirect pattern, based on the so called solvent structure forming and the latter based on the so called osmophobic effect.
  • the osmoprotectant stabilize the microscopic structure of the solvent, by creating a network of hydrogen bonds with the water molecules.
  • osmoprotectants are able to reduce the auto diffusion coefficient of water, affecting therefore not only the structural but also the dynamic properties of water.
  • the solvent thus disturbed results less prone to interact with the hydrophobic proteic residues, forming the central core of the protein, responsible for imparting stability to the same.
  • Two compounds of this type are for example ectoine and trehalose, that, when applied alone to stressed skin are unable to show the aforementioned osmoprotecting properties.
  • the present invention therefore relates to cosmetic compositions and in particular dermal cosmetic compositions comprising as the active ingredients an association of ectoine and trehalose, in combination with suitable excipients and/or diluents.
  • the cosmetic composition according to the present invention contain ectoine and trehalose in molar ratios ranging from 1:5 to 5:1, preferably from 1:4 to 4:1, even more preferably from 1:3 to 3:1, According to a particular preferred embodiments these molar ratio range from 1:2 to 2:1.
  • ectoine + trehalose total amounts range from 0,1 to 5% by weight, preferably from 0,5 to 2% even more preferably from 1 to 1,5% based on the total composition weight.
  • the osmoprotecting activity of the association of ectoine and trehalose at the aforementioned low dosages is quite surprising, also taking into account that the Applicant has demonstrated by carrying out a model simulation, reported in the experimental part of the present description that the osmoprotecting activity towards the C12 protein exhibited by the association of ectoine and trehalose is observed only in the presence of very concentrated solution containing respectively ectoine 1M and trehalose 1M,in other words with a total concentration of ectoine and trehalose 2M and that the best results are obtained in the presence of ectoine and trehalose respectively at concentration 0.75 M and 1.5 M and 1.5 Mm but also 1.5 and 0.75M amounting in both cases to a total equal to 2.25 M. Therefore at concentrations of at least two magnitude order higher than the highest concentration of these osmoprotectants in the cosmetic composition of the invention.
  • the cosmetic composition of the invention may comprise at least one further active ingredient selected from ceramide, in particular ceramide 3, cholesterol, fatty acids in particular stearic acid, vitamins in particular vitamin A and E, peptides, preferably oligopeptides, hyaluronic acid, Lysolecithins, lysophoshatidic acid, ferment lysates and mixtures thereof.
  • the cosmetic compositions of the invention may be formulated with conventional excipients used in the cosmetic field such as: Aqua, Glycerin, Caprylic/Capric triglyceride, Dimethicone, Aluminum starch octenylsuccinate, Butylene glycol, Tribehenin PEG-20 esters, Macadamia ternifolia seed oil, Dipentaerythrityl hexacaprylate/Hexacaprate, Cetyl alcohol, Olus oil, Cyclopentasiloxane, Dimethiconol, Hydrogenated lecithin, PEG-20 methyl glucose sesquistearate, Polysilicone-11, Butylene glycol dicaprylate/Dicaprate, Caprilyl methicone, Tapioca starch, Triethylhexanoin, Trimethylsiloxyphenyl dimethicone, Ammonium acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer, Ch
  • compositions are in particular in the form of w/o or o/w emulsions, sera ointment, gel-creams, body milks, sun and after sun milks, sun and after sun gel-cream and sun sera etc.
  • compositions of the invention and unlike those containing respectively only ectoine and trehalose, exhibit osmoprotecting property against skin osmotic stress as demonstrated by the following experimental tests herewith reported only for illustrative purposes.
  • SkinEthic ® Reconstructed Human Epidermis (RHE) of 0,5 cm 2 is a fully differentiated epidermis formed after 17 day of air-lift culture of NHK from skin biopsies in a chemically defined medium.
  • the model reproduces epidermal morphology and it has been fully characterized.
  • the good barrier function, batch reproducibility and low variability in terms of permeability for probe molecules have been described in the Literature compared to human ex-vivo models.
  • the tissue and media are manufactured in compliance with ISO 9001.
  • the RHE were transferred to a 6-well plate previously filled with maintenance medium (1 mL/well) at room temperature and incubated at 37°C, 5% CO 2 , saturated humidity. The test has been started the day after the arrival.
  • NEGATIVE CONTROL was the saline solution (0,9% NaCl) which is characterized by its neutral action on tissues.
  • the cell membrane forms a functional barrier around the cell, and traffic into and out of the cell is highly regulated by transporters, receptors and secretion pathways. When cells are damaged, they become 'leaky' and this forms the basis for the second type of assay. Membrane integrity is determined by measuring lactate dehydrogenase (LDH) in the extracellular medium. This enzyme is normally present in the cytosol, and cannot be measured extracellularly unless cell damage has occurred. A commercially available kit (Cytotoxicity Detection KIT-LDH, Roche) has been used to quantify the LDH released in culture media by a colorimetric assay based on formazan salt detection ( ⁇ 492 nm with reference at 690nm).
  • LDH lactate dehydrogenase
  • the culture supernatant is collected and incubated with the reaction mixture including the kit (20 min, room T°, in the dark).
  • An increase in the amount of dead or plasma membrane-damaged cells results in an increase of the LDH enzyme activity in the culture media.
  • This increase in the amount of enzyme activity in the supernatant directly correlates to the amount of formazan formed during a defined time period therefore, the amount of color formed in the assay is proportional to the number of lysed cells.
  • RNAqueous method is a rapid, phenol free, filter based RNA isolation system used to extract the total RNA from cellular samples.
  • the High Capacity cDNA Reverse Transcription kit was used to synthetize cDNA from RNA.
  • Gene expression is the process by which the inheritable information in a gene, such as the DNA sequence, is made into a functional gene product, such as protein or RNA. Relative quantification determines the change in the expression of a nucleic acid sequence in a test sample relative to the same sequence in a calibrator sample. Beta-actin was used as an endogenous control gene to normalize input amounts.
  • Fluorescence data of the RT-PCR generated by the thermocycler ABI PRISM 7500 Fast are collected by the internal software SDS 2.0.5 and the Raw Data (RQ study results) are printed and exported in Excel.
  • the higher optical density has been quantified in the media of stressed RHE and used as 100 % higher citotoxicity value.
  • the optical density of Negative Control has been considered as a control lower value.
  • STRESSED RHE was found as the high control stressed sample after 16h recovery (100 % citotoxicity) but it recovered the viability after 48h (80,23 %).
  • TEER Trans epithelial electric resistance
  • SOL1, SOL2, SOL3 and GLYCERIN 5% have been applied on the epidermal surface of cold stressed RHE for 16h and 48h treatment.
  • the cold stress performed by 30' induction at -20°C corresponds to a block of water flux: the treatment has been done at this moment and followed by 16h and 48h recovery allowing to monitor the dynamic of the genomic response and to study product mechanism of action: the fig.3 described RHE's physiological response of saline solution treatment and glycerol compared to the RHE physiological response of the same treated with SOLUTIONS 1,2,3.
  • SOL2 like Glycerol 5%, reduced the expression of AQP3.
  • the high standard deviation reflects the difference in LDH release of the two biological replicates.
  • SOL1, SOL2, SOL3 and GLYCERIN 5% have reduced the expression of HSP 72 after 16h of recovery: as observed for AQP3 where a conservative pathway of water was established and an adaptive mechanism also for HSP 72 is observed at this time.
  • SOL 1, SOL 2, SOL 3 have also been applied in standard conditions in order to extrapolate their direct influence in non stress conditions.
  • Osmotic stress has been induced by cold conditions (-20 °C) for 30 minutes: TEER was severely reduced and the damage at membrane level has been confirmed by LDH release.
  • the cold stress model described had been followed by a physiological defence response (16h and 48h recovery) allowing to monitor the dynamic of the genomic response (AQP3 and HSP1A1) and to study product's mechanism of action.
  • RHE STRESSED and treated with SALINE was used as calibrator control of cold stress induction, because it better represents a stressed tissue in which saline solution has the role of placebo for the 3 solutions.
  • the cold stress induces an entrapment of water in the tissues, forming inactive water clusters, that can be modified, activated by product's efficacy.
  • AQPs are proteins that facilitate the transport of water across cell membranes.
  • AQP-3 in particular has a key role in the transport and distribution of epidermal water and glycerol and the regulation of keratinocyte differentiation, both critical processes for maintaining skin hydration, barrier function and overall skin health.
  • SOL1, SOL2, SOL3 applied on the epidermal surface of RHE for 16h and 48h treatment have been significantly reduced the expression of AQP3 in standard conditions suggesting a block of water channels and conservative water flux.
  • SOL1 and SOL3, applied after stress induction induced an over-expression of AQP3 after 48h of recovery showing a protective conservative pathway of water cluster in the early read-out and a moisturizing effect in the late recovery period.
  • hygroscopic mechanism had been indirectly confirmed by these results: hygroscopic molecules have not an active mechanism on epidermal hydration; in environmental stress conditions they adsorb water from the tissue resulting in a dehydration mechanism.
  • the human HSP70 family consists of at least 12 members (Tavaria et al 1996):
  • Heat shock proteins were originally described for their roles as chaperones induced by temperature shock as well as various other kinds of stress including environmental (UV radiation, heat shock, heavy metals and amino acids), pathological (bacterial, parasitic infections or fever, inflammation, malignancy or autoimmunity) or physiological stresses (growth factors, cell differentiation, hormonal stimulation or tissue development), that induced a marked increase in intracellular HSP (iHSP) synthesis known as the stress response (Park HS et al. 2002).
  • environmental UV radiation
  • heat shock heavy metals and amino acids
  • pathological bacterial, parasitic infections or fever, inflammation, malignancy or autoimmunity
  • physiological stresses growth factors, cell differentiation, hormonal stimulation or tissue development
  • intracellular HSP70 has a cytoprotective effect and furthermore induces the cell's anti-apoptotic mechanisms, modulates cell cycle progression and has an anti- inflammatory action.
  • SOL3 significantly increased the expression of HSP1A1 after incubation of 48h of recovery showing cytoprotection and anti-inflammatory response.
  • the product enables the release of water from water clustered during the cold stressed tissue (-20°C) thanks to the AQP 3 over-expression and a cyto-protective conservative pathway of protein's structure on the basis of the HSP-72 overexpression at the time 48h.
  • Purpose of the test is to evaluate the effect on the cutaneous microcirculation flow and the cutaneous density.
  • the test was carried out on 20 female volunteers having dry and sensitive face skin of average age: 49.7 years. The selection was carried out according to the following criteria.
  • This instrument measures the rate and the volume of surface hematic capillary flow of skin.
  • This instrument is a high resolution ecograph scanner with HF ultrasounds emission (20MHz, allowing to study skin up to 15mm depth with an axial resolution of 60 ⁇ m and side resolution of 200 ⁇ m.
  • This instruments measures the derma density and its main components. Young skin exhibits a higher density if compared to mature skin.
  • the effectiveness of a densifying results in a significant increase in skin density, denoting an improvement in dermal structure.
  • the instruments measurements were carried out inside a room with controlled temperatures and humidity (24 ⁇ 2°C; 50 ⁇ 10% r.h.)
  • a second set of instrument measurements was carried out 2 hours after the application of the active gel and placebo gel (dose 2mg/cm 2 ) on each half face of the volunteers.
  • the application site (right or left) was randomized among the volunteers.
  • a volunteer interrupted the test for reasons correlated to the product due to the appearance of side effect such as skin dryness and desquamation.
  • the treatment with active gel resulted in a statistically significant decrease of the basal values of cutaneous microcirculation blood flow both after 2 hours from the application and after 3 weeks of treatments. No statistically significant variations were observed following the treatment of placebo.
  • the repeating application of the active gel induced a statistically significant increase of cutaneous density for the active gel, whereas the variation for the placebo gel was not statistically significant.
  • the application of the active gel resulted in a statistically significant reduction of the basal cutaneous microcirculation blood flow towards the parameter normalization both after 2h and after 3 weeks of treatment.
  • the active gel brought to a statistically significant increase in cutaneous density, resulting in a densifying action of the active gel.
  • Applicant also carried out simulation of molecular dynamics using as the model the protein C12 in ectoine and/or trehalose solution to study the distribution of these compounds around the protein and evaluate a possible osmophobic effect.
  • the starting structure of the protein C12 was obtained by the data base PDB (CODE lYPC).
  • the protein was inserted in a virtual cubic box of 80 ⁇ side, the necessary amount of osmoprotectas was added to reach the desired concentration.
  • the osmoprotectant are inserted in casual positions inside the solvation box, thereafter the system was solvated with water described by the model TIP4P. Then, the protein being positively charged, the electro-neutrality of the system was guaranteed by the addition of two chloride anions.
  • the simulations were carried out using the software GROMACS 4.5.3.
  • the system prepared as described above was subjected to 10000 optimization steps of geometry using alternately the steepest descendent (SD) and the conjugated gradient (CG) methods, in particular 1 SD step for 10 CG steps.
  • SD steepest descendent
  • CG conjugated gradient
  • the system was then balanced for 100 steps at constant volume and temperatures, followed by further 100 steps at constant pressure and temperature.
  • the C ⁇ atoms of the protein were fixed at their original position by means of an armonic bond.
  • the equilibration was followed by a productive phase lasting 20 ns under constant pressure and temperature, wherein the armonic bonds on C ⁇ were removed.
  • the temperature was maintained at the reference value(310°K) recalculating the particles rates forming the system , while maintaining the pressure at an average value of 1 bar coupling the system by isotropy to a baric bath using Berendsen's algorithm.
  • AMBER03 strength field was used to describe the protein, whereas GAFF strength field was used to describe osmoprotectants .
  • the simulation analyses were carried out with GROMACS modules.
  • the preferential coefficients of the individual compounds (ectoine and trehalose) with respect to the protein was calculated.
  • a positive preferential coefficient indicates a gathering of the compound (ectoine or trehalose)with respect to the solution bulk, a negative coefficient means a rarefying thereof.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Cosmetics (AREA)
EP12425137.2A 2012-08-09 2012-08-09 Compositions cosmétiques dermiques ayant une activité osmo-protectrice Active EP2695600B1 (fr)

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Application Number Priority Date Filing Date Title
EP12425137.2A EP2695600B1 (fr) 2012-08-09 2012-08-09 Compositions cosmétiques dermiques ayant une activité osmo-protectrice
ES12425137.2T ES2624306T3 (es) 2012-08-09 2012-08-09 Composiciones cosméticas dermales que tienen actividad osmoprotectora
PCT/EP2013/066234 WO2014023649A2 (fr) 2012-08-09 2013-08-01 Compositions cosmétiques dermatologiques ayant une activité osmoprotectrice

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EP2695600A1 true EP2695600A1 (fr) 2014-02-12
EP2695600B1 EP2695600B1 (fr) 2017-02-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021073761A1 (fr) * 2019-10-16 2021-04-22 Symrise Ag Compositions ayant des propriétés antimicrobiennes
CN114569491A (zh) * 2022-04-18 2022-06-03 华熙生物科技股份有限公司 一种抑制油脂生成的组合物及其用途

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* Cited by examiner, † Cited by third party
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EP3134086A2 (fr) * 2014-04-22 2017-03-01 Biodue S.p.A. Composition à usage topique
CN117618321A (zh) * 2024-01-24 2024-03-01 成都普什制药有限公司 一种保湿修复精华液及其制备方法

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EP0671161A1 (fr) * 1993-12-14 1995-09-13 Marbert GmbH Ectoine et dérivés de l'ectoine comme agents hydratants dans des compositions cosmétiques
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EP0180559A2 (fr) * 1982-08-16 1986-05-07 Norman Orentreich Composition hydratante dermatologique et méthode
EP0671161A1 (fr) * 1993-12-14 1995-09-13 Marbert GmbH Ectoine et dérivés de l'ectoine comme agents hydratants dans des compositions cosmétiques
FR2877222A1 (fr) * 2004-11-04 2006-05-05 Oreal Composition cosmetique comprenant un agent hydratant et une hydroxyalkyl uree
FR2940059A1 (fr) * 2008-12-24 2010-06-25 Lvmh Rech Compostion cosmetique contenant au moins deux osmolytes a effet hydratant ou anti-age

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021073761A1 (fr) * 2019-10-16 2021-04-22 Symrise Ag Compositions ayant des propriétés antimicrobiennes
CN114569491A (zh) * 2022-04-18 2022-06-03 华熙生物科技股份有限公司 一种抑制油脂生成的组合物及其用途
CN114569491B (zh) * 2022-04-18 2023-08-18 华熙生物科技股份有限公司 一种抑制油脂生成的组合物及其用途

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ES2624306T3 (es) 2017-07-13
WO2014023649A2 (fr) 2014-02-13
EP2695600B1 (fr) 2017-02-01
WO2014023649A3 (fr) 2014-05-01

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